Antispinning device



D. TURNER.

ANTSPINNING DEVICE,

APPLICATION FILED APII.25, 19m.

Patented Apr. 6,1920.

UNITED STATES PATENT OFFICE. i

DOUGLAS TURNER, OF ST. LOUIS, MISSOURI, ASSIGNOR TO TI-IE MEASUREGRAII-I COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

ANTISPINNING DEVICE.

Specification of Letters Patent.

Patented Apr. 6, 1920.

Application led April 25, 1919. Serial No. 292,661.

T0 all whom it may concern.'

Be it known that I, DOUGLAS TURNER, a citizen of the United States, residing in the city of St. Louis and State of Missouri, have invented new and useful JImprovements in Antispinning Devices, of which the following is a specification.

This invention relates to fabric measuring machines, and has for its object the provision of means for preventing the measuring roll from rotating after the end of the fabric measured has been drawn from between the measuring roll and pressure roll.

The machine to which my invention relates is of the type illustrated in various applications of the late falter E. Hosch, for eX- ample, in application Serial No. 17 ,154, filed March 26, 1915, for cloth measuring and computing machine.

In the use of this machine, especially in measuring remnants, the operator fre quently draws the fabric through the machine very rapidly with the result that as the fabric passes from between the rollers the measuring roll will be caused to spin, or rotate, to a greater or less extent, thereby causing the dial to indicate a greater length of goods than is actually the case.

To overcome this, the present invention provides a friction member which is adapted to operate immediately upon the passage of the end of the fabric from between the rollers in a manner to substantially lock the rollers against rotation.

In the preferred embodiment of the invention, a smooth-surfaced friction disk is mounted co-axially with the measuring roll, but geared to rotate, either in the same or a reverse direction, at a different rate of speed, said friction disk having its smooth surface concentric and substantially flush with the surface of the measuring roll so that the measuring roll and the friction disk will be simultaneously engaged by the pressure roller as soon as the fabric passes fro-m between them, whereby, due to the difference in speed of rotation between the friction disk and the measuring roll, the engagement of the friction disk with the pressure roll will impede the momentum thereof, and the pressure roll will impede the rota* tion of the measuring roll, with the result that the rotation of the rolls ceases practically simultaneously with the withdrawal of the .fabric from between them. The

surface, or periphery, of the friction disk being smooth, offers no appreciable resistance to the passage of the goods between the two rolls, even when the friction disk' is geared to rotate in a different direction from the measuring roll. At the same time, the pressure roll being usually of rubber` the engagement between the said roll and the surface of the friction disk will yield the necessary frictional engagement to prevent independent rotation of the disk and pressure roll.

In the accompanying drawings:

Figure 1 is a vertical longitudinal section through the measuring roll on the line 1-1 of Fig. 3;

Fig. 2 is an end view of the measuring and pressure rolls, a portion of the base and `chart housing being broken away;

Fig. 3 is a view in rear elevation showing the gearing employed 1n operating the braking disk; and

Fig. 4 is a plan view of the same gearing. The numeral 1 indicates the measuring roll which is mounted upon a hollow shaft 2 rotating in the bearings 3 mounted in f the tubular housing 4, which is attached Vrotating in the hollow shaft 2 is a spindle 11 which has a bearing also in a sleeve 12 mounted on the bracket 13 at the other end of the measuring roll construction. The spindle 11 has keyed to it, adjacent to the measuring roll 1, a friction disk 14, which is made preferably of a hard and non-resilient substance having the periphery 15 smooth and polished. Motion is transmitted by the measuring roll 1, shaft 2, hub 8 and gear 10 to the spindle 11 and friction disk 14 by means of gears 16 and 17 mounted on a hub 18 and gear 19 rigidly attached to the spindle 11 by means of the. bushing 20 and nut 2l, so that when the measuring roll is rotated in one direction the friction disk or brake member 14 is rotated at a different Verybcing smooth and polished.

speed either in the saine, or a different, direction by means of the gearing described. The gear 22 is an idler gear interposed in the train to reverse the direction of rotation of the friction disk let. It is evident, however, that the successful operation of this device does not depend '.on the direction of rotation of the friction disk 141 in reference to that of the measuring roll, but upon the fact that the rotational speed of both members are different. Therefore, the idler gear 22 can be omitted and the direction of rotation of the measuring roll and friction disk will be the same, but their velocities will be different. VIt is evident, however, that a slightly quickerl or greater retarding action will be exerted on the `measuring roller When the friction disk is rotated in the reverse direction to that of the measuring yroller than when it is rotated in Athe same direction, although I have not found the difference great enough to be of special moment. I have thought it best to show, however, that such alternative arrangement is lwithin Vthe contemplation of my invention.

The operation of the device is as follows:

When the fabric is inserted in the machine the pressure roll 23 is inthe elevated position shown by the dotted lines in Figs. 1 and 2; and when lowered by the starting button, not shown, the fabric is clamped not. only between the pressure roll and the measuring roll but between the pressure roll and the Epolishedsurface of the friction vdisk 14 as well. The degree of pressure exerted by the lpressure roll is governed by a spring 24-which ,engages one end of a pivoted arm 25 on'the other end of which said pressure roll is rotatably mounted. As the fabric lis drawn through the machine, the measuring roll 1 is rotated, and the friction disk 1 4, although in Contact with the under side of the cloth, does not create suiicient friction to retard the movement of the goods, owing'to its periphrl`he instant the fabric passes out from betweenthe rolls, the upper roll comes into contact with the friction disk and by virtue of the fact that ,this pressure roll has a more or less soft surface in comparison with the hard polished surface o f the friction disk, the latter will make strong contact with the surface of the pressure roll. VOn account ofthe differences -in rotational speeds, or directions, or both,

of the lmeasuring roll and friction disk, the ,engagement of the pressure roll with the measuring roll simultaneously with its engagement-with the friction disk, will cause the two rolls to be substantially locked against rotation; or, in other words, enough friction will be zthrown into the system to :greatly reduce the tendency toward spinning and thereby insuring an accurate, Vor more accurate, reading ofthe dial Athan would otherwise be obtained. In fact, even when the fabric is pulled through the machine at -a high rate of speed, the spinning of the rolls is reduced so materiallybythe friction disk that the resultant effect at the measuring dial lis'so slight as to be immaterial. In all ordinary use the rolls cease rotating almost instantly with the passing of the goods from between them.

I claim:

1. In a fabric measuring machine, in combination with a measuring roll anda pressure `roll adapted to make contact and to be rotated by drawing `the fabric to vbe measured between them, a brake means including a member positioned to be engaged bythe pressure roll simultaneously with the engagement ofthe latter with the :measuring roll when the fabric passes from between the rolls.

42. In a fabric measuring machine, in combination with -a Ymeasuring roll and .a pressure roll vadapted Vto make ycontact'and to be rotated by drawing the fabric :to be measured between fthem, a brake means including a member having a surface substantially flush with that of the measuring roll and adapted to be engaged by the pressure roll simultaneously withl the engagement .of the latter with the measuring v-ro'll whenfthe fabric passes from between the rolls.

3. In a fabric measuring machine, in combination with a measuring -roll and a pressure roll adapted to make Contact and to be rotated by drawing the fabric to be measured between them, a rotatable fbrake member, and means whereby said brake member is rotated lfrom. the measuring roll at a different rate of speed from that of said measuring roll, saidbrake -member being adapted'to be engaged-bythe pressure roll simultaneously withthe engagement of the latter with the measuring -roll when the fabric passes from lbetween the rolls.

4. In a fabric measuring machine, in combination with a measuring roll and a pressure roll adapted to make contact and to be rotated by d-rawing =the lfabric to be measured between vthem, -a rotatable fbrake member, and means whereby said brake member is rotated fromsaid measuring roll at a slower rate of speed'than that of said measuring roll, said 'brake ,member 'being adapted to be engaged bythe pressure roll simultaneously -with the engagement of Athe latter with the measuring roll when the fabric passes from between the rolls.

t5. In a fabric measuring machine, in combination lwith a measuring roll and a pressure roll adapted to make contact and to be rotated by drawing the fabric to be measured between them, a rotatable disk mounted coaXially with the measuring roll and of substantially the same diameter and means whereby said disk is rotated from said measuring vroll Vat a different rate of whereby said disk is rotated from said measuring roll at a rate of speed different from that of said measuring roll and in a direction opposite to that of the rotation of said measuring roll, said disk being adapted to be engaged by the pressure roll simultaneously with the engagement of the latter with the measuring roll when the fabric passes from between the rolls.

In testimony whereof I have hereunto set my hand.

DOUGLAS TURNER. 

